Another issue i have that forces me to Digital.. All the LP's i want are Obscure fetching in the region of £200-£1K each, Thanks to Dealers & other greed orientated crap these records are out of reach nowadays. You can however buy any of the albums on CD for less than a tenner each.. It a horrible thing being forced to do something you do not want to do. 


 

Back on thread...

I'm definitely getting faster at messing with Rune from the command line in Putty.
After much faffing, and for some reason making the whole thing go silent when I attempted 24/176.4 (yes, I tried it three times and 24/192 works so I don't know why either) I've finally settled on 24/88.2...for now.

It's certainly odd. As far as I know, the Bushmaster is 24/192 capable, in fact, it was playing quite happily when I switched to that rate of upsampling, it just didn't seem to like the 176.4 for some reason.  I may try that rate with another DAC tomorrow and see what happens.

A year or two back Martin, John and Mike dropped in for an afternoon.

I did run through the sample rates and how each one can sound quite different, clearly audible. Also demonstrated files played at their non native rate and how it doesn't quite seem right compared to it's native rate or a direct multiple of that native rate.

In fact at shows the vast majority of the music we play is at red book standard and NOT up-sampled at all. We only play around 20% of music at 24/96 and above.

Strat made a very valid comment about processing ability, if you have the ability to look at the current draw on your streaming device when you change sample rates you will see a respectable increase in such as the processor is working 'harder' to do the calculations therefore draws more power. I believe I did show this to the chaps that afternoon as well.

For our reference designer unit (which we use to design various products), I wrote an up-sampling algorithm which employs an individual 'strings' for each sample rate. The incoming signal is put through a metaphorical clocking box which is referenced by an atomic standard clock (instead of an SRC chip) depending on which sample rate you use, there is a direct correlation to the amount of math's the CPU has to calculate to achieve the desired rate also the amount of power required to do so.

Something else that would also be relevant here, the quality of the incoming data stream, IE the Spotify source, now doesn't matter how good the receive end of your digital playback system is, the state of your home network is the key to good streaming.

Most people are lucky to have 30Mb pipe coming in, take in to account, your phone, the good ladies phone, kids phone, laptops, pads, netflix all running constantly which does eat into the bandwidth you have, now a streamer running at red book is 1.4Mps incoming data rate, with 24/96Khz streaming rate Qoboz etc that jumps to 4.6Mps do not be surprised if you have a good stream all of the time.

In fact one of the best upgrades you can achieve is to purchase a decent home router (BT owners of late have had issues with the newer type 'A' hub and even some guys who had the replacement type 'B' versions have changed providers)

If you rely on your broadband connection a great deal, have a longer distances between your equipment and the router, then I would suggest a quality router will bring dividends to your streaming, movies, gaming and general browsing.

I use a pro router and have faultless wifi and a large bandwidth I can run 15 streaming devices simultaneously with no issues however you guys do not need such an costly item.

Just picked these out at random

7best.co.uk/7-best-wireless-routers-uk/


www.themasterswitch.com/best-wireless-routers


www.expertreviews.co.uk/networks/wireless-routers/1403819/best-wireless-routers-improve-your-internet-speed-range


The one test you can do at home, supply your dac with a recorded file from your PC/Laptop/player and compare it against the Spotify stream, then use the up sampling in your PI control and see if you can hear a difference then.

Or your streamer from pass-through to the desired sample rate.

Hi Martin

When you originally did those tests where you running the two motorcyclist batteries at the time?

My Bushmaster Mk1 was definitely silent when being fed 24/176.4 so I'm guessing that answers the question of which one it was, Martin. 

Like most people who know bugger-all I made the obvious mistake of assuming that as the Bushmaster coped with 192 it would cope with anything up to, and including that number, without a thought as to how it would achieve that.

You sure? cos i dont see anything in it other than both sounding cack! 

He started it